Damper



UNITED .srArss PATENT ()FFI-CE.

WILLIAM v. con'rnor CELINA, OIT-IIO.

DAMPER.

Application filed June 30,

To all whom it may concern:

- Be it known that I, lVILLIAM V. CoA'rn, a citizen of the United States, residing at Celina, in the county of Mercer and State of Ohio, have invented certain new and useful Improvements in Dampers, of which the following is a specification- This invention has for its object the provision of a simple and eflicient means whereby the draft through a fire will be automatically controlled and the effective temperature regulated as desired. The invention is designed more particularly for carrying forward the apparatus for which Letters Patent No. 1,255,709 were granted to me February 5, 1918, and extends the principle of the invention covered by said Letters Patent to an automatic damper controlling the admission of air to the ash chamber of a range or other heating plant which damper is connected to the automatic damper disposed in the smoke pipe above the heating plant.

The present invention is illustrated in the accompanying drawings, in which- Figure 1 is an end elevation of a kitchen range having my improvements applied thereto, a part ofthe apparatus being broken away and parts shown in section;

Fig. 2 is a rear elevation of a kitchen range equipped with the present improvements, with parts broken away and in section;

Fig. 3 is a detail perspective view of an air conduit which is employed in the prac-' tical application of the invention as illustrated in Figs. 1 and 2;

Fig. 4 is a detail section on the line 4-4 of Fig. 2;

F ig. 5 is a diagrammatic view of theautomatically operating dampers;

Fig. 6 is a detail perspective view of the lower damper;

Fig. 7 is a, detail of the bearing for the intermediate rocking frame.

For convenience, I have, in the accompany drawings, shown the invention applied to an ordinary kitchen range, indicated at 1, but it is to be understood that such showing is illustrative only and not restrictive as my invention may be applied to other forms of heating plants and is intended to be so applied, the object of the invention being to provide automatic dampers disposed above and below the heating plant whereby when the draft through the smoke pipe or chim- Specification of Letters Patent.

1919. Serial No. 307,510.

ney caused by the rising heated air reaches a certain predetermined point the damper in the smoke pipe will be opened to check the draft and the damper below the furnace or other plant will be closed to cut off the access of cold air to the fire-box. The smoke pipe or flue 2 is of the usual :onstruction and in terposed therein is a casing 3 containing a damper 4 the same in all respects as the casmg and damper illustrated in my aforesaid patent. In carrying out the present invention, I mount upon the smoke pipe a rocking frame 5avhich is illustrated as a bar shaped to pass entirely around the pipe and provided at diametrically opposite points with lugs 6 having beveled lower ends or edges to seat in or rock upon bearing lugs 7 formed on the smoke pipe whereby the frame will be mounted and supported by knife edge bearings so'as to oscillate freely. The front. end of the rocking frame 5 is connected with the adjusting arm 8 of the damper by a chain or other flexible connection 9 and said end of the frame is heavier than its rear end for a purpose to be stated. Tothe rear end of said frame 5, I attach a chain 10 which extends downwardly to the crank or governor arm'll of the lower damper 12 which is provided in its side edges with shoulders 13 having beveled edges adapted to rock on bearing shoulders provided therefor in the partition or wall 14 in the. same manner as the upper damper 4 is mounted. A casing 15 is provided on the back of the range or other heating plant so as to inclosethe chain 10 and thereby .protect the same against accidental injury. This casing incloses the partition or wall 14, in which the damper12 is mounted, and should fit around said wall in such a manner that it will be practically air-tight and, consequently, no air can pass beyond the damper except by way of the prescribed con duit 16 which carries it to the ash box. The wall 14 is at one end of the conduit 16 which is secured in a practically air-tight manner upon the back of the heating plant and extends toward that end thereof in which the ash chamber is located where it is provided with branches 17 which extend inwardly at the sides of the ash chamber and have open ends whereby the air passing through the conduit may escape into the ash chamber and thence into the fire-box through the grate to support combustion and eventually pass out through the smoke flue in the usual Patented June 1, 1920. i

manner. The conduit 16 is provided with a flange 18 through which suitable fastening devices are inserted into the wall of the heating plant and suitable packing may be interposed between the flange and the wall to prevent'the escape of air with a resulting unsatisfactory draft. A brace 19 is secured rigidly to and extends between the casings 3 and so as to retain the dampers a fixed distance apart and insure the proper operation of the same. The lower portion of the casing 15 is provided with openings 20 to shown in Fig. .6, the adjusting arm of the upper damper being omitted from the lower damper. The upper damperis mounted to rock in the wall of the escape flue or p1pe'2 and, in closed position, forms practically a part of said wall and thereby closes the draft opening therethrough. The lower damper 1'2 likewise in closed position forms practically a part of the partition 14 and fills the opening through the same. The arm 11 of the lower damper by reason of its own weight tends to move said damper to open position as will be readily understood on reference to Fig. 1. The governor arm of the upper damper projects within the smoke pipe or flue and tends to hold the said damperin a vertical positionto cut-off the draft while the adjusting arm projects from the front or outer side of said damper and carries a dial movable to and from the damper by the operation of said arm. When the dial is at the outer end of the adjusting arm it will counterbalance the weight of'the governor arm and the damper may then rock freely and will open under a slight draft and pressure from the outer colder air. By shifting the dlal lnwardly, however, the inwardly pro ecting governor arm 18 glven greater preponderance and a greater pres sure by the outer colder air is required to overcome the governor arm and open the damper; As the pressure from the air outside the flue or escape'pipe is dependent on V the draft through the flue and the draft is determined by the temperature of'the air flowing through the flue, it is clear that by properly setting the dial the damper may be caused to open automatically when any desired'temperature hasbeen reached so that i the draft will then be checked. In Fig. 5 the upper damper is shown in the opened position and upon reference to said figure it will be noted that the opening movement of.

the upper damper will permit the heavier front end of the frame 5 to drop so that said frame will be rocked andthe chain 10 caused to pull up on the arm 11 of'the lower damper 12 and rock said damper to closed position. When the upper damper swings to closed position, the chain 9 will be drawn upward and will cause the frame 5 to rock so that the chain 10 will slacken and the lower damper 12 will be rocked to open position by the weight of the arm 11. The needed draft through the fire will thus be automatically maintained and the temperature kept uniform without any attentionupon the part of.

the fireman. My improved mechanism 18 exceedingly simple and may be readily applied to any heating plant now in use.

7 Having thus described my invention,what is claimed-as new is:

1. The combination with a-heating plant comprising a fire-box and an escape flue, of a damper mounted between its upper and lower edges for oscillation in the wall of the escape flue under the influence of the draft therethrough, bearing lugs on the escape flue below said damper, a rocking frame encircling the flue and provided with knife edge bearings seating on the said lugs, the end of the frame nearer the damper overbalancing the opposite end thereof, a flexible connection between said damper and the heavier end of the rocking frame, a damper mounted between its upper and lower edges for oscillationin the 'inlet to the fire-box, and a flexible connection between the lighter end of the rocking frame and the last-named damper.

2. The combination with a heating plant comprising an escape flue and an ash box,

of a conduit disposed at the rear of the heating plant and having branches opening into the ash box, an oscillatory damper mounted in the inlet to said conduit, an oscillating damper mounted in the wall of the escape flue, a frame encircling the flue and mounted for rocking movement thereon, the ends of 1 WILLIAM v. ooATE. [n 8.] 

